Blue Apatite
Fluorapatite · Mineral Specimen and Semi-Precious Gemstone
Crystal System
Hexagonal, typically occurring as prismatic crystals or massive, granular aggregates
Mineral Group
Phosphates, specifically the apatite group
Chemical Formula
Ca5(PO4)3(F,Cl,OH)
Formation Process
Igneous, metamorphic, and hydrothermal processes; often found in pegmatites, carbonatites, and regionally metamorphosed rocks
About This Crystal
A rough, unpolished mineral specimen exhibiting a vibrant blue-green color with translucent to opaque areas. It displays a vitreous to sub-resinous luster with visible fractures and uneven crystal faces typical of a broken or rough chunk.
Physical Characteristics
Color ranges from vibrant blue to teal and green; white streak; poor to indistinct cleavage; conchoidal to uneven fracture; specific gravity around 3.1 to 3.2; brittle tenacity; exhibits weak to moderate fluorescence under UV light depending on trace impurities
Optical Properties
Uniaxial negative with low birefringence (0.001 to 0.005); refractive index ranges from 1.630 to 1.667; often shows weak to moderate dichroism in colored varieties
Hardness & Durability
Origin Region
Notable sources include Madagascar, Brazil, Russia, Mexico, and India; typically forms in igneous and metamorphic environments
Hardness & Durability
Mohs hardness of 5, making it a reference mineral for hardness 5; low toughness with poor cleavage makes it fragile and susceptible to scratching, requiring careful handling for jewelry use
Care & Maintenance
Clean gently with warm, soapy water and a soft cloth; avoid ultrasonic cleaners, harsh chemicals, steam, and prolonged exposure to direct sunlight or high heat to prevent fading or damage
Rarity & Value
Common to uncommon depending on color saturation and clarity; vibrant neon blue and deep purple varieties command higher prices, while rough specimens are generally affordable and widely available
Special Characteristics
Often exhibits weak phosphorescence or fluorescence under ultraviolet light; valued for its rich neon-like blue coloration resembling more expensive gemstones like Paraiba tourmaline
Lore & History
Popular in modern metaphysical practices as a stone of manifestation, personal power, and motivation, associated with the Third Eye and Throat chakras; traditionally believed to stimulate clarity and focus (note: these are metaphysical beliefs, not scientific claims)